US1967513A - Electronic discharge tube - Google Patents

Electronic discharge tube Download PDF

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Publication number
US1967513A
US1967513A US589389A US58938932A US1967513A US 1967513 A US1967513 A US 1967513A US 589389 A US589389 A US 589389A US 58938932 A US58938932 A US 58938932A US 1967513 A US1967513 A US 1967513A
Authority
US
United States
Prior art keywords
cathode
rectifier
current
discharge tube
anode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US589389A
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English (en)
Inventor
Ponte Maurice
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Radiotechnique SA
Original Assignee
Radiotechnique SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Radiotechnique SA filed Critical Radiotechnique SA
Application granted granted Critical
Publication of US1967513A publication Critical patent/US1967513A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/04—Electrodes; Screens
    • H01J17/06—Cathodes

Definitions

  • This invention is for a hot cathode .gasfill-ed rectifier. It has long been known that the potential at the terminals of a rectifier :tube comprisinga he'ate'd cathode and anode, submerged in an extremely high vacuum, increases in proportion as the output of current from the tube increases, in consequence of the cloud of electrons which surrounds the cathode and opposes the discharge of electrons from the Lcathode. It has also been long known that this potential may be considerably diminished and made practically independent of the output current by submerging the cathode and anode in a gas or a metallic vapor, the ions of which reduce the space charge due to the electron cloud.
  • a grid is preferable to that of a solid metal cylinder surrounding the cathode'as, to be efficient, the cylinder must be placed comparatively near to the cathode which causes the production of a high density of current prejudicial to a long life of the cathode and to obtaining a high resistance with reversed potential in the rectifying action. It is preferable that the ionization of the gas is distributed over the whole of the free space of the tube and the use of a solid cylinder is not advantageous from this point of view, particularly with cathodes which are not equi-potential, the current having a tendency to be localized at the points which are nearest to the anode.
  • the solid cylinder forms a reflector for the heat coming from the cathode; if account be taken of this gain of energy for calculating the form of the cathode, the system will be found to possess a considerable calorific inertia practically preventing the heating up of the cathode under potential and, if this gain is ignored, the cathode is heated too much in permanent load, which is prejudicial to a long life.
  • Fig. 1 of the drawing represents diagrammatically a hot cathode mercury rectifier tube.
  • Fig. 2 is a plain view of a grid cap of the same tube.
  • the cathode is shown in the form of a flat helically wound band 1 arranged to be heated by current en-- tering the bulb by the conductor leads 3, 4; an anode 2 is situated at the top of the bulb 7, which latter contains a drop of mercury 9.
  • the actual improvement according to the invention is constituted by a grid 5 which surrounds the cathode and is electrically connected thereto by a connector 6.
  • the grid is combined with a cap 8 which constitutes a screen between the cathode and anode.
  • cal winding of the cathode is wound on a mandrel of 3 m/m diameter
  • the grid 5 .consists'of a helix of 0.7 m/m pitch and 10 m/m diameter, these figures being given as non-restrictive examples to this particular case.
  • the helithe rectifiers consequently give stable operation rendered certain by having said screen connected directly to the cathode so as to form an auxiliary portion thereof.
  • the invention has been more particularly described with reference to mercury vapor rectifiers, but it is clearly applicable to all gas-filled rectifiers such as rectifiers filled with rare gases.
  • a gas-filled electronic diode rectifier which comprises in combination a cathode, an anode, and a grid element in the form of an open screen surrounding the cathode and connected electrically to the said cathode by a direct connection the said grid being combined with a screen interposed'between the cathode and the anode.

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  • Discharge Lamp (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Lasers (AREA)
US589389A 1931-02-12 1932-01-28 Electronic discharge tube Expired - Lifetime US1967513A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR718218X 1931-02-12

Publications (1)

Publication Number Publication Date
US1967513A true US1967513A (en) 1934-07-24

Family

ID=9090463

Family Applications (1)

Application Number Title Priority Date Filing Date
US589389A Expired - Lifetime US1967513A (en) 1931-02-12 1932-01-28 Electronic discharge tube

Country Status (4)

Country Link
US (1) US1967513A (fr)
DE (1) DE718218C (fr)
FR (1) FR727680A (fr)
GB (1) GB387123A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864027A (en) * 1954-06-21 1958-12-09 Kaiser Ind Corp Grid-controlled space discharge device
US8858531B2 (en) 2009-06-24 2014-10-14 Becton Dickinson France Connection assembly for a drug delivery device, and method for making this assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748676C (de) * 1936-03-29 1944-11-08 Anordnung zur Erzeugung von Kippschwingungen mittels gittergesteuerter, mit Gluehkathode ausgestatteter Gasentladungsroehren

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864027A (en) * 1954-06-21 1958-12-09 Kaiser Ind Corp Grid-controlled space discharge device
US8858531B2 (en) 2009-06-24 2014-10-14 Becton Dickinson France Connection assembly for a drug delivery device, and method for making this assembly

Also Published As

Publication number Publication date
DE718218C (de) 1942-03-06
GB387123A (en) 1933-02-02
FR727680A (fr) 1932-06-22

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